Agreed. The Sabres should not be spending assets--whether picks, players/prospects, or just plain cap space--on a 3C right now. Not a need.
Now, if they were to trade one of the 3C/4Cs in a package to get something more, and get another player capable of that spot in the package back, sure, but the motivation can't be to improve at 3C. It's gotta be to improve at D/G.